- Obituary (1819 Hits)
- Obscurity (2878 Hits)
- Officium Triste (1386 Hits)
- Omission (1267 Hits)
- Omnium Gatherum (170 Hits)
- Onheil (885 Hits)
- Onkel Tom Angelripper (951 Hits)
- Onslaught (1629 Hits)
- Oppressus (1540 Hits)
- Orae (1395 Hits)
- Orden Ogan (1431 Hits)
- Out For Blood (944 Hits)
- Outrage (JPN) (474 Hits)
- Overkill (1307 Hits)
- Ozzy Osbourne (1466 Hits)